.nav {
    height: 40px;
    background-color: #678876;
}

.nav ol {
    display: flex;
    justify-content: space-around;
    line-height: 40px;
}

.nav ol li a {
    color: #ffffff;
}

.nav ol li a:hover {
    color: sandybrown;
    border-bottom: 1px sandybrown solid;
}


/* 内容 */

.article {
    padding: 20px;
}

.article .w {
    display: flex;
}

.article .article-left dl {
    width: 300px;
    border: 1px solid #ccc;
}

.article-left dl dt {
    border: 1px solid #ccc;
    height: 50px;
    background-color: #F8F8F8;
    line-height: 50px;
    text-indent: 1em;
    color: #666666;
    font-size: 20px;
}

.article-left dl dd {
    height: 30px;
    border-bottom: 1px solid #ccc;
    line-height: 30px;
    font-size: 16px;
    color: #888;
    text-indent: 2em;
    color: #888;
}

.article-left dl dd a:hover {
    color: orange;
    text-decoration: underline;
}

.article-right {
    margin-left: 40px;
}

.article-right #cont li a {
    border-bottom: 1px solid #ccc;
    padding: 20px 0;
    display: flex;
    float: left;
    width: 770px;
}

.article-right li h4 {
    height: 20px;
    line-height: 20px;
}

.article-right li .brief {
    margin-left: 30px;
}

.article-right li .brief .author {
    height: 30px;
    line-height: 30px;
    font-size: 14px;
    padding-top: 10px;
    color: #666;
}

.article-right li .brief .inst {
    line-height: 25px;
    line-height: 25px;
    font-size: 12px;
    color: #999;
    text-indent: 2em;
}

.article-right li .car {
    line-height: 60px;
}

.article-right #cont li .add {
    outline: none;
    border: 0;
    background-color: tomato;
    color: #fff;
    padding: 5px;
    float: right;
    margin-top: 90px;
}